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1) x(x-6) = x(x-4)+2
x^2 - 6x = x^2 - 4x +2
x^2 - x^2 - 6x + 4x -2 = 0
-2x - 2 =0
x = -1 .............. (tidak termasuk persamaan linear)
2) 2x(x+5) = x(x-6) + y
2x^2 + 10x = x^2 - 6x +y
2x^2 - x^2 +10x + 6x - y =0
x^2 + 16x - y = 0 ................. (termasuk persamaan linear)